An aching tooth can be a real nuisance, and it's good to know some synonyms in case you need to describe the pain to your dentist or someone else. One option is "toothache," which describes the pain specifically in the tooth or teeth. Another possibility is "dental pain," which can refer to any discomfort in the mouth, including the gums, tongue, or jaw. You could also say that you have a "sore tooth," "hurting tooth," or "painful tooth." Whatever word you choose, make sure to address the issue as soon as possible, as dental pain can be a sign of a more serious issue.